John baeumle



(No Model.) J. BAEUMLE.

BUNG.

Patented Sept. 11, 1894.

MNMCM WM Km f i.

(IQ/r 7 UNITED STATES PATENT OFFICE.

JOHN BAEUMLE, OF MILWAUKE, WISCONSIN, ASSIGNOR OF ONE-FOURTH TO MICHAELPOETZEL, OF SAME PLACE.

BUNG.

SPECIFICATION forming part of Letters Patent No. 525,833, datedSeptember 11, 1894.

Application tiled November 21I 1893. Serial No. 491,539. (No model.)

To all whom t may concern:

Be it known that I, JOHN BAEUMLE, of Milwaukee, in the county ofMilwaukee and State of Wlsconsin, have inventeda new and usefulImprovement in Bunge, of which the'followlng 1s a description, referencebeing had to the accompanying drawings, which are a part of thisspecification. f

My invention has relation to improvements 1n bungs.

rIhe invention consists of the devices and parts as hereinafterdescribed and claimed, or their equivalents, constituting moreespeelally certain improvements upon the Letters Patent of the UnitedStates issued to me under date of September 20, 1892, and numbered482,714.

In the accompanying drawings, Figure 1, represents a fragment of a stavein which my improved bung is inserted. Fig. 2, is a trans- Verse sectionon the line 2-2 of Fig. 1. Fig. 3, 1s a view of the inner face of thefrustoconical collar, and Fig. 4, is an elevation of the expansiblering.

Like numerals of reference denote like parts throughoutthe severalviews. Referring to the drawings, the numeral 1 1nd1cates a stave of abarrel in which an ordlnary bushing 2 is inserted in the screwthreadedbung aperture thereof.

The numeral 3 indicates a disk, forming part of my improved bung,provided with a central screw-threaded aperture, and having its outerface of substantially truncated conical form, and its inner faceprovided with a central inward projecting screw threaded b'oss 4, whichis adapted to receive. an interlorly threaded cap 5. The edge of thedisk 1s formed with an outward-extending peripheral flange 6. Adapted topass through the central screw-threaded opening of the disk is a bolt 7,said bolt being threaded between the plane portions 8 and 9, as clearlyshown lin the drawings. The bolt is further formed, next to the part 9,into av hexagonal enlargement 10, and nally terminates in the'usualheaded portion 11.

Bearing against the disk 3, and surrounding thebolt, is a ring 12, ofrubber or other Suitable elastic material, of a form substantiallycylindrical upon its outer face, and its inner surface beveled from theends inward, forming tapering portions 13 and 14, the former registeringwith the disk 3. The periphery of this ring, at opposite edges, isrecessed, as indicated at 15, 15, the inner recess receiving theperipheral iange 6 of the disk 3, and the outer recess receiving asimilar iiange 16 formed annularly around the periphery or rim of afrusto-conical collar 17, whereby said anges are brought flush with themain portion of the ring. The truncated apex of this collarv is providedwith a central aperture through which the bolt 7 passes, the planeportion 9 of said bolt, when in the position illustrated in Fig. 2,registering therewith.

The outer face of disk 3, and the inner face of collar 17 are providedwith a series of radial ribs 18 and 19, respectively, which are adaptedto take into corresponding grooves 2O formed in the respectivecontiguous surfaces of the ring 12, when the parts are adjusted t0-gether, and thereby hold the disk and collar rigid with the rubber ring.A transverse pin 21 intersects the plane portion 8 of the bolt, andis'adapted to act against the inner face of the disk 3, as willhereinafter more fully appear. It will be noticed that the cap 5protects the central opening of the disk 3, and prevents the entrance ofany pitch, or the contents of the barrel, into the bolt opening, byreason of which said opening is always kept free of extraneous matter,and therefore prevented from being clogged. The flanges 6 and 16 of thedisk and collar, respectively, also prevent the entrance of any pitch,or other matter, between the contacting faces of the disk and collar andthe ring, which matter would otherwise enter said space and prevent anice adjustment of the parts together, and also ll up the grooves 20,and thereby prevent the ribs 18 and 19 from interlocking therewith. Thelianges also have a further important function in preventing the outeredges of the ring 12 pressing or spreading out against the metallicbushing, and they also assist in holding the disk and collar more firmlyto the rubber ring, so that the turning of said ring past the radialribs is rendered more difcult.

IOO

Prior to applying my improved bung, it will be understood that the innerdisk 3 is not screwed up against the face of the rubber ring closeenough to expand the latter. In view of this, no trouble is experiencedin inserting the bung in place. After adjustment, however, the bolt isturned, preferably by means of a tool or Spanner engaging the hexagonalenlargement. As the bolt is thus turned, the disk 3 is forced outwardagainst the face of the rubber ring. When the bolt has been screwedinward far enough to allow the hexagonal enlargement to bear against thecollar, the latter also is made to exert a pressure against the rubberring. The result of these two pressures against opposite faces of thering is of course to spread said ring outward against the bushing, thusmaking a perfect liquid and air tight closure of the bung hole.

When it is desired to remove the bung, the bolt is turned in theopposite direction to that before described, whereby pressure againstthe rubber ring is relieved. After this, the bung may be readily pulledout by applying lateral force thereto. It sometimes happens that thebore of the bushing becomes coated with pitch, resulting in the rubberring 12 adhering closely thereto. In such case, it is quite difficult toremove the bungs by a direct pull thereon, without first turning therubber rlng, and loosening the same. To provide for the removal of thebung under such circumstances,l employ the transverse intersecting pin21, so that after the bolt has been screwed outward a certain distancethis pin will come in frictional contact with the end i of the boss 4.Before such engagement the bolt of course turns independently of theother parts-that is to say turns in the aperture of the disk withoutimparting a corresponding rotation thereto. The moment the pin makescontact with the end of the boss, however, the disk is made to rotate,and as the rubber ring is locked thereto by the engagement of the ribsupon the outer face of the disk with the corresponding grooves of thering, said ring is also rotated, and in addition thereto thefrusto-conical collar. Of course, thc moment the ring is rotated, if anypitch upon the bushing has caused an adherence between the latter andthe ring, said ring is loosened in this way, and the bung removedwithout difficulty.

In addition to the above means for 1cosening the rubber ring from thebushing in case the latter adheres to said bushing by reason of aninterposed coating of pitch, I provide in the present improvement othermeans for obtaining the same result, which means may be either used inconnection with the other mechanism above described, and which iscovered in my former patent hereinbefore re ferred to, or may be usedentirely separate therefrom. This means consists in forming in therubber ring l2 an annular groove 22, which receives therein anexpansible split ring 23. As the rubber ring is expanded by drawingtogether of the disk and collar throughtheaction of the bolt the splitring is also necessarily expanded. Now, without the employment of theexpansible split ring, in case the rubber ring should stick to thebushing through the cause abovementioned, after the disk and collar aremade to recede from each other, for the purpose of withdrawing the bung,it will perhaps be found that the rubber ring does not possesssufficient contractile power to release itself from the pitch. By theprovision of the expansible ring, however, this ring will by its owninherent contractile power resume its normal condition, after thepressure of the disk and collar is discontinued, and in resuming thisnormal state will necessarily carry with it and contract the rubberring, and thus release the latter from the adhering pitch.

The present invention differs from that described and claimed in myformer patent, No. 482,714, dated September 20, 1892, not only in theprovision of the feature just described, but also in providing theperipheral anges for the disk and collar, and the protecting cap securedto the projecting boss of the disk.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a bung, the combination, of an elastic ring, provided with aperipheral groove, a split spring ring fitting in the groove of therecess, and means for expanding the elastic ring against the bushing ofthe bung-hole,

substantially as set forth.

2. In a bung, the combination, of an elastic ring, a split ringencircling the same, disks acting against opposite faces of the elasticring, and a screw-bolt passing through said disks and drawing the sametogether to expand said elastic ring, substantially as set forth.

3. In a bung, the combination, of an elastic ring, a split ringencircling the same, disks acting against opposite faces of the elasticring, and a screw-bolt passing through said disks and drawing the sametogether to expand the ring, said bolt provided at its inner end with acontacting surface constructed to act against the inner face of theinner disk upon the unscrewing thereof, and to rotate the bungtherewith, substantially as setforth.

4. In a bung, the combination, with an elastic ring, of disks fittingagainst opposite faces of the ring, said disks provided with peripheraliianges surrounding the cylindrical outer surface of the ring atopposite edges thereof, substantially as set forth.

5. In a bung, the combination, of an elastic ring, disks acting againstopposite faces thereof, said disks provided with peripheral angessurrounding the cylindrical outer surface of the ring at opposite edges,and a screw-bolt passing through said disks and through the ring, andadapted to draw the disks together to expand said ring, substantially asset forth.

6. In a bung, the combination, of an elastic ring provided with radialgrooves, disks act- IIO ing against opposite faces of the ring, thecontacting faces of the disks provided with radial ribs fitting thegrooves of the ring, and the rims of said disks provided with flangessur-V rounding the outer cylindrical surface of the ring at oppositeedges, substantially as set forth. f

7. In a bung, the combinatiomof an elastic ring provided With a centralbolt-hole, disks acting against opposing faces of the ring, said disksprovided with holes registering with the bolt-hole of the ring, and theinner of said disks provided with a projecting boss surrounding thebolt-hole thereof, a bolt passing through the registering bolt-holes,and a cap littng the projecting boss, substantially as set forth.

8. The combination, of a bung` provided with a central aperture, a boltpassing through the central aperture, and a cap fitting around zo JOHNBAEUMLE.

Witnesses:

ARTHUR L. MoRsELL, ANNA V. FAUs'r.

